We took the Incognito core’s great performance and wrapped it in a textured polyester cover, creating a ball that has the length desired from polyester with a little extra kick down lane from the asymmetrical Incognito core. The Spy features a medium RG 2.51 with a strong diff of .053 and a medium intermediate diff of .017. Core Numbers 16 lb 15 lb 14 lb RG 2.523 2.513 2.530 DIFF 0.046 0.053 0.053 INT DIFF 0.015 0.017 0.017 Spec Table Spec Label Spec Value Level Performance Polyester Part Number 60-106584-93X Color Red / Black Core Asymmetric (DynamiCore) Coverstock Textured Polyester Cover Type Polyester Finish 500, 1000 Siaair / Factory Compound / Factory Polish Weights 16-14 lbs. RG 2.513 (15 lb.) DIFF 0.053 (15 lb.) INT DIFF 0.017 (15 lb.) Warranty One year from purchase date DynamiCore Technology The Spy features Brunswick’s innovative outer core technology called DynamiCore. This industry-leading technology is a more durable outer material that yields less compression upon impact increasing hitting power and creating an undeniable difference in sound and pin carry. Learn more about DynamiCore Technology https://radicalbowling.com/products/balls/current/the-spy